perf trace: Remove unused code in builtin-trace.c
[linux-2.6.git] / tools / perf / builtin-trace.c
1 #include "builtin.h"
2
3 #include "util/util.h"
4 #include "util/cache.h"
5 #include "util/symbol.h"
6 #include "util/thread.h"
7 #include "util/header.h"
8
9 #include "util/parse-options.h"
10
11 #include "perf.h"
12 #include "util/debug.h"
13
14 #include "util/trace-event.h"
15
16 static char             const *input_name = "perf.data";
17 static int              input;
18 static unsigned long    page_size;
19 static unsigned long    mmap_window = 32;
20
21 static unsigned long    total = 0;
22 static unsigned long    total_comm = 0;
23
24 static struct rb_root   threads;
25 static struct thread    *last_match;
26
27 static struct perf_header *header;
28 static u64              sample_type;
29
30
31 static int
32 process_comm_event(event_t *event, unsigned long offset, unsigned long head)
33 {
34         struct thread *thread;
35
36         thread = threads__findnew(event->comm.pid, &threads, &last_match);
37
38         dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n",
39                 (void *)(offset + head),
40                 (void *)(long)(event->header.size),
41                 event->comm.comm, event->comm.pid);
42
43         if (thread == NULL ||
44             thread__set_comm(thread, event->comm.comm)) {
45                 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
46                 return -1;
47         }
48         total_comm++;
49
50         return 0;
51 }
52
53 static int
54 process_sample_event(event_t *event, unsigned long offset, unsigned long head)
55 {
56         char level;
57         int show = 0;
58         struct dso *dso = NULL;
59         struct thread *thread;
60         u64 ip = event->ip.ip;
61         u64 timestamp = -1;
62         u32 cpu = -1;
63         u64 period = 1;
64         void *more_data = event->ip.__more_data;
65         int cpumode;
66
67         thread = threads__findnew(event->ip.pid, &threads, &last_match);
68
69         if (sample_type & PERF_SAMPLE_TIME) {
70                 timestamp = *(u64 *)more_data;
71                 more_data += sizeof(u64);
72         }
73
74         if (sample_type & PERF_SAMPLE_CPU) {
75                 cpu = *(u32 *)more_data;
76                 more_data += sizeof(u32);
77                 more_data += sizeof(u32); /* reserved */
78         }
79
80         if (sample_type & PERF_SAMPLE_PERIOD) {
81                 period = *(u64 *)more_data;
82                 more_data += sizeof(u64);
83         }
84
85         dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
86                 (void *)(offset + head),
87                 (void *)(long)(event->header.size),
88                 event->header.misc,
89                 event->ip.pid, event->ip.tid,
90                 (void *)(long)ip,
91                 (long long)period);
92
93         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
94
95         if (thread == NULL) {
96                 eprintf("problem processing %d event, skipping it.\n",
97                         event->header.type);
98                 return -1;
99         }
100
101         cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
102
103         if (cpumode == PERF_RECORD_MISC_KERNEL) {
104                 show = SHOW_KERNEL;
105                 level = 'k';
106
107                 dso = kernel_dso;
108
109                 dump_printf(" ...... dso: %s\n", dso->name);
110
111         } else if (cpumode == PERF_RECORD_MISC_USER) {
112
113                 show = SHOW_USER;
114                 level = '.';
115
116         } else {
117                 show = SHOW_HV;
118                 level = 'H';
119
120                 dso = hypervisor_dso;
121
122                 dump_printf(" ...... dso: [hypervisor]\n");
123         }
124
125         if (sample_type & PERF_SAMPLE_RAW) {
126                 struct {
127                         u32 size;
128                         char data[0];
129                 } *raw = more_data;
130
131                 /*
132                  * FIXME: better resolve from pid from the struct trace_entry
133                  * field, although it should be the same than this perf
134                  * event pid
135                  */
136                 print_event(cpu, raw->data, raw->size, timestamp, thread->comm);
137         }
138         total += period;
139
140         return 0;
141 }
142
143 static int
144 process_event(event_t *event, unsigned long offset, unsigned long head)
145 {
146         trace_event(event);
147
148         switch (event->header.type) {
149         case PERF_RECORD_MMAP ... PERF_RECORD_LOST:
150                 return 0;
151
152         case PERF_RECORD_COMM:
153                 return process_comm_event(event, offset, head);
154
155         case PERF_RECORD_EXIT ... PERF_RECORD_READ:
156                 return 0;
157
158         case PERF_RECORD_SAMPLE:
159                 return process_sample_event(event, offset, head);
160
161         case PERF_RECORD_MAX:
162         default:
163                 return -1;
164         }
165
166         return 0;
167 }
168
169 static int __cmd_trace(void)
170 {
171         int ret, rc = EXIT_FAILURE;
172         unsigned long offset = 0;
173         unsigned long head = 0;
174         struct stat perf_stat;
175         event_t *event;
176         uint32_t size;
177         char *buf;
178
179         trace_report();
180         register_idle_thread(&threads, &last_match);
181
182         input = open(input_name, O_RDONLY);
183         if (input < 0) {
184                 perror("failed to open file");
185                 exit(-1);
186         }
187
188         ret = fstat(input, &perf_stat);
189         if (ret < 0) {
190                 perror("failed to stat file");
191                 exit(-1);
192         }
193
194         if (!perf_stat.st_size) {
195                 fprintf(stderr, "zero-sized file, nothing to do!\n");
196                 exit(0);
197         }
198         header = perf_header__read(input);
199         head = header->data_offset;
200         sample_type = perf_header__sample_type(header);
201
202         if (!(sample_type & PERF_SAMPLE_RAW))
203                 die("No trace sample to read. Did you call perf record "
204                     "without -R?");
205
206         if (load_kernel() < 0) {
207                 perror("failed to load kernel symbols");
208                 return EXIT_FAILURE;
209         }
210
211 remap:
212         buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
213                            MAP_SHARED, input, offset);
214         if (buf == MAP_FAILED) {
215                 perror("failed to mmap file");
216                 exit(-1);
217         }
218
219 more:
220         event = (event_t *)(buf + head);
221
222         if (head + event->header.size >= page_size * mmap_window) {
223                 unsigned long shift = page_size * (head / page_size);
224                 int res;
225
226                 res = munmap(buf, page_size * mmap_window);
227                 assert(res == 0);
228
229                 offset += shift;
230                 head -= shift;
231                 goto remap;
232         }
233
234         size = event->header.size;
235
236         if (!size || process_event(event, offset, head) < 0) {
237
238                 /*
239                  * assume we lost track of the stream, check alignment, and
240                  * increment a single u64 in the hope to catch on again 'soon'.
241                  */
242
243                 if (unlikely(head & 7))
244                         head &= ~7ULL;
245
246                 size = 8;
247         }
248
249         head += size;
250
251         if (offset + head < (unsigned long)perf_stat.st_size)
252                 goto more;
253
254         rc = EXIT_SUCCESS;
255         close(input);
256
257         return rc;
258 }
259
260 static const char * const annotate_usage[] = {
261         "perf trace [<options>] <command>",
262         NULL
263 };
264
265 static const struct option options[] = {
266         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
267                     "dump raw trace in ASCII"),
268         OPT_BOOLEAN('v', "verbose", &verbose,
269                     "be more verbose (show symbol address, etc)"),
270         OPT_END()
271 };
272
273 int cmd_trace(int argc, const char **argv, const char *prefix __used)
274 {
275         symbol__init();
276         page_size = getpagesize();
277
278         argc = parse_options(argc, argv, options, annotate_usage, 0);
279         if (argc) {
280                 /*
281                  * Special case: if there's an argument left then assume tha
282                  * it's a symbol filter:
283                  */
284                 if (argc > 1)
285                         usage_with_options(annotate_usage, options);
286         }
287
288         setup_pager();
289
290         return __cmd_trace();
291 }